Non-stupid people fail to realize how costly dealing with stupid people is.
The probability of being stupid is independent of any other characteristic, such as education or status. The basic laws of human stupidity
Cipolla categorizes behavior into four types based on gains/losses for oneself and others: Non-stupid people fail to realize how costly dealing
Everyone consistently underestimates the number of stupid individuals. The basic laws of human stupidity
The is a seminal essay by Italian economic historian Carlo M. Cipolla , first published in 1976. It presents a satirical yet rigorous framework for understanding stupidity as a distinct and highly dangerous social force. The Five Basic Laws
Book Review-The Basic Laws of Human Stupidity - Thor Projects
Stupid people are the most dangerous type because their irrational actions are unpredictable. Cipolla's Matrix of Human Behavior